Usefulness of Conventional MRI Sequences and Diffusion-Weighted Imaging in Differentiating Malignant From Benign Portal Vein Thrombus in Cirrhotic Patients

2013 ◽  
Vol 201 (6) ◽  
pp. 1211-1219 ◽  
Author(s):  
Kumaresan Sandrasegaran ◽  
Bilal Tahir ◽  
Kavitha Nutakki ◽  
Fatih M. Akisik ◽  
Uttam Bodanapally ◽  
...  
Keyword(s):  
Portal Vein ◽  
Diffusion Weighted Imaging ◽  
Conventional Mri ◽  
Diffusion Weighted ◽  
Portal Vein Thrombus ◽  
Mri Sequences ◽  
Cirrhotic Patients ◽  
And Diffusion

scholarly journals Palatal lesions: discriminative value of conventional MRI and diffusion weighted imaging

2016 ◽  
Vol 89 (1059) ◽  
pp. 20150911 ◽  
Author(s):  
Ying Yuan ◽  
Weiqing Tang ◽  
Mengda Jiang ◽  
Xiaofeng Tao
Keyword(s):  
Diffusion Weighted Imaging ◽  
Conventional Mri ◽  
Diffusion Weighted ◽  
Discriminative Value ◽  
And Diffusion

Nonaccidental Pediatric Head Injury: Diffusion-weighted Imaging Findings

Neurosurgery ◽  
2001 ◽  
Vol 49 (2) ◽  
pp. 0148-396X ◽  
Author(s):  
Daniel Y. Suh ◽  
Patricia C. Davis ◽  
Katherine L. Hopkins ◽  
Nancy N. Fajman ◽  
Timothy B. Mapstone
Keyword(s):  
Head Injury ◽  
Head Trauma ◽  
Diffusion Weighted Imaging ◽  
White Matter Injury ◽  
Computed Tomographic ◽  
Poor Outcome ◽  
Nonaccidental Trauma ◽  
Conventional Mri ◽  
Diffusion Weighted ◽  
Mri Sequences

Abstract OBJECTIVE Diffusion-weighted imaging (DWI) reveals nonhemorrhagic posttraumatic infarction hours to days before conventional computed tomographic scanning or magnetic resonance imaging (MRI). We evaluated the diagnostic utility of DWI in children with nonaccidental head trauma. METHODS The medical records and imaging examinations obtained between January 1998 and May 2000 for all children less than 2 years of age with presumed or suspected nonaccidental head injury were reviewed retrospectively. Twenty children who had undergone DWI within 5 days of presentation were included in the study. Computed tomographic scans, conventional MRI sequences, and DWI combined with apparent diffusion coefficient (ADC) maps were evaluated. RESULTS Eleven girls and nine boys (median age, 5 mo) were studied. Eighteen children had presumed nonaccidental head trauma, and two children had suspected nonaccidental head trauma. Of the 18 children with presumed nonaccidental trauma, 16 (89%) demonstrated abnormalities on DWI/ADC, as compared with neither of the two children with suspected nonaccidental trauma. In 13 (81%) of 16 positive cases, DWI revealed more extensive brain injury than was demonstrated on conventional MRI sequences or showed injuries not observed on conventional MRI. DWI combined with ADC maps allowed better delineation of the extent of white matter injury. DWI/ADC abnormalities in the nonaccidental head-injured children were likely to involve posterior aspects of the cerebral hemispheres, with relative sparing of the frontal and temporal poles. Severity on DWI correlated significantly with poor outcome (P < 0.005). CONCLUSION DWI has broad applications in the early detection of infarction in children with nonaccidental head injury and enhances the sensitivity of conventional MRI. In the patients in this study, early DWI provided an indicator of severity that was more complete than any other imaging modality. The use of DWI may help to identify children at high risk for poor outcome and to guide management decisions.

The usefulness of diffusion-weighted imaging for differentiating portal vein thrombus from tumour embolus

2016 ◽  
Vol 64 (5) ◽  
pp. 279-284 ◽  
Author(s):  
C.Z. Geng ◽  
L.H. Song ◽  
Y.C. Mi ◽  
M.G. Zhang ◽  
Q.Y. Li ◽  
...  
Keyword(s):  
Portal Vein ◽  
Diffusion Weighted Imaging ◽  
Diffusion Weighted ◽  
Portal Vein Thrombus ◽  
Tumour Embolus

scholarly journals MRI diffusion-weighted imaging detects a fresh portal vein thrombus as a high intensity lesion in a patient with a liver transplant: A case report

2021 ◽  
Vol 10 (12) ◽  
pp. 205846012110695
Author(s):  
Yasuyoshi Kuroiwa ◽  
Kazunori Kusumoto ◽  
Keita Shimata ◽  
Atsushi Yamashita ◽  
Taizo Hibi ◽  
...  
Keyword(s):  
Case Report ◽  
Portal Vein ◽  
Portal Vein Thrombosis ◽  
Diffusion Weighted Imaging ◽  
High Signal ◽  
Vein Thrombosis ◽  
Imaging Tool ◽  
Diffusion Weighted ◽  
Portal Vein Thrombus ◽  
Intensity Lesion

Portal vein thrombosis is one of the most serious complications after liver transplantation. It is important to determine the age of the thrombus for management of portal vein thrombosis. We present a case report of histologically confirmed heterogenous fresh portal vein thrombus which was depicted heterogenous high signal intensity on magnetic resonance diffusion weighted imaging. The sequence may be a useful imaging tool for detecting fresh thrombus components in the portal vein thrombosis.

scholarly journals Testicular tumors: discriminative value of conventional MRI and diffusion weighted imaging

Medicine ◽  
2021 ◽  
Vol 100 (48) ◽  
pp. e27799
Author(s):  
Weiwei Wang ◽  
Zhanguo Sun ◽  
Yueqin Chen ◽  
Fan Zhao ◽  
Hao Yu ◽  
...  
Keyword(s):  
Diffusion Weighted Imaging ◽  
Testicular Tumors ◽  
Conventional Mri ◽  
Diffusion Weighted ◽  
Discriminative Value ◽  
And Diffusion

The Added Value of Inflow-Based Vascular-Space-Occupancy and Diffusion-Weighted Imaging in Preoperative Grading of Gliomas

2021 ◽  
pp. 1-8
Author(s):  
Haimei Cao ◽  
Xiang Xiao ◽  
Jun Hua ◽  
Guanglong Huang ◽  
Wenle He ◽  
...  
Keyword(s):  
Diagnostic Accuracy ◽  
Roc Curve ◽  
Diffusion Weighted Imaging ◽  
Low Grade ◽  
High Grade ◽  
Mr Images ◽  
Vascular Space ◽  
Diffusion Weighted ◽  
High Grade Gliomas ◽  
And Diffusion

Objectives: The present study aimed to study whether combined inflow-based vascular-space-occupancy (iVASO) MR imaging (MRI) and diffusion-weighted imaging (DWI) improve the diagnostic accuracy in the preoperative grading of gliomas. Methods: Fifty-one patients with histopathologically confirmed diffuse gliomas underwent preoperative structural MRI, iVASO, and DWI. We performed 2 qualitative consensus reviews: (1) structural MR images alone and (2) structural MR images with iVASO and DWI. Relative arteriolar cerebral blood volume (rCBVa) and minimum apparent diffusion coefficient (mADC) were compared between low-grade and high-grade gliomas. Receiver operating characteristic (ROC) curve analysis was performed to compare the tumor grading efficiency of rCBVa, mADC, and the combination of the two parameters. Results: Two observers diagnosed accurate tumor grade in 40 of 51 (78.4%) patients in the first review and in 46 of 51 (90.2%) in the second review. Both rCBVa and mADC showed significant differences between low-grade and high-grade gliomas. ROC analysis gave a threshold value of 1.52 for rCBVa and 0.85 × 10−3 mm2/s for mADC to provide a sensitivity and specificity of 88.0 and 81.2% and 100.0 and 68.7%, respectively. The area under the ROC curve (AUC) was 0.87 and 0.85 for rCBVa and mADC, respectively. The combination of rCBVa and mADC values increased the AUC to 0.92. Conclusion: The combined application of iVASO and DWI may improve the diagnostic accuracy of glioma grading.

scholarly journals The role of magnetic resonance cholangiopancreatography and diffusion-weighted imaging for the differential diagnosis of obstructive biliary disorders

2017 ◽  
Vol 21 (1) ◽  
Author(s):  
Zeynep Cetiner-Alpay ◽  
Fatma Kulali ◽  
Aslihan Semiz-Oysu ◽  
Yasar Bukte ◽  
Kamil Ozdil
Keyword(s):  
Magnetic Resonance ◽  
Sensitivity And Specificity ◽  
Gold Standard ◽  
Diffusion Weighted Imaging ◽  
Magnetic Resonance Cholangiopancreatography ◽  
Malignant Tumours ◽  
Diagnostic Efficacy ◽  
Diffusion Weighted ◽  
Sensitivity Specificity ◽  
And Diffusion

Background: Although endoscopic retrograde cholangiopancreatography (ERCP) is accepted as the gold standard, there is a place for magnetic resonance cholangiopancreatography (MRCP) and diffusion-weighted imaging (DWI) in the diagnosis of obstructive biliary disorders.Aim: To compare the findings of MRCP with ERCP in patients with obstructive biliary disorders and to investigate the diagnostic efficacy of MRCP combined with DWI.Study design: Retrospective, analytic, cross-sectional study.Methods: The MRCP images of 126 patients who underwent both MRCP and ERCP owing to biliary obstruction were reviewed. Nine patients were excluded because of incomplete diagnostic workup or a long period (>3 months) between MRCP and ERCP. Ninety-two patients underwent DWI, which was also evaluated. The sensitivity, specificity and accuracy of MRCP and DWI were analysed.Results: The sensitivity, specificity and accuracy of MRCP according to ERCP results as the gold standard was 97%, 71% and 93% for assessment of biliary dilatation; 100%, 94.7% and 97.5% for the diagnosis of choledocholithiasis; 93.7%, 100% and 99% for the identification of benign strictures; 100%, 100% and 100% for the diagnosis of malignant tumours; and 100%, 100% and 100% for the detection of complicated hydatid cysts; respectively. The sensitivity and specificity of DWI for the diagnosis of malignant tumour was 100%. In the detection of choledocholithiasis, the sensitivity and specificity of DWI was 70.8% and 100%.Conclusions: MRCP is an alternative, non-invasive, diagnostic modality, comparable with ERCP for the evaluation of pancreaticobiliary diseases. DWI can be helpful for diagnosis of choledocholithiasis and tumours.

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